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1.2 Convection Currents and the Mantle

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Vocabulary

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Heat transfer: The movement of energy from a warmer object to a cooler object
Radiation: The transfer of energy through empty space
Conduction: Heat transfer by direct contact of particles of matter
Convection: heat transfer involving the movement of fluids,liquids, and gases
Convection current: The flow that transfers heat within a fluid
Density: A measure of how much mass there is in a volume of substance

outline

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Radiation

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• sunlight is the radiation that warms the Earth's surface
  • one form of radiation is the heat that you feel around a open fire

Conduction

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• the particles near the bottom vibrate faster as they're heated
  • For example: Heat is transfered from the hot soup to the cool spoon

Convection

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• during convection the heated particles of the fluid began to flow
  • Heat transfer involves the movement of fluids,liquids and gases

Convection in Earth's mantle

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• Earth's mantle responds to heat
  • In the Earth the cycle of rising and sinking takes place